2009-07-31 00:48:20 +03:00
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/* -*- Mode: C ; c-basic-offset: 2 -*- */
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/*
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* LADI Session Handler (ladish)
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*
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2011-07-31 19:16:40 +03:00
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* Copyright (C) 2008,2009,2010,2011 Nedko Arnaudov <nedko@arnaudov.name>
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2009-07-31 00:48:20 +03:00
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* Copyright (C) 2008 Juuso Alasuutari <juuso.alasuutari@gmail.com>
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*
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**************************************************************************
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* This file contains code of the D-Bus helpers
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**************************************************************************
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*
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2009-09-05 00:11:33 +03:00
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* Licensed under the Academic Free License version 2.1
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*
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2009-07-31 00:48:20 +03:00
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* LADI Session Handler is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* LADI Session Handler is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with LADI Session Handler. If not, see <http://www.gnu.org/licenses/>
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* or write to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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2009-08-09 22:19:32 +03:00
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#include <stdbool.h>
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#include <dbus/dbus.h>
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#include <string.h>
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2009-12-13 17:48:29 +02:00
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#include <stdlib.h>
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2009-08-09 22:19:32 +03:00
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#include "helpers.h"
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#include "method.h"
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2009-09-20 18:02:10 +03:00
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#include "../log.h"
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2009-09-20 18:48:42 +03:00
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#include "../assert.h"
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2009-12-13 17:48:29 +02:00
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#include "../common/klist.h"
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2009-08-09 22:19:32 +03:00
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2010-12-02 05:21:51 +02:00
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#define DBUS_CALL_DEFAULT_TIMEOUT 3000 // in milliseconds
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2009-08-09 22:19:32 +03:00
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DBusConnection * g_dbus_connection;
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DBusError g_dbus_error;
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2010-12-23 02:36:58 +02:00
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static char * g_dbus_call_last_error_name;
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static char * g_dbus_call_last_error_message;
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2009-08-09 22:19:32 +03:00
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2009-12-13 17:48:29 +02:00
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struct dbus_signal_hook_descriptor
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{
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struct list_head siblings;
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char * object;
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char * interface;
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void * hook_context;
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const struct dbus_signal_hook * signal_hooks;
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};
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struct dbus_service_descriptor
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{
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struct list_head siblings;
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char * service_name;
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void (* lifetime_hook_function)(bool appeared);
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struct list_head hooks;
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};
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LIST_HEAD(g_dbus_services);
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2010-12-23 02:36:58 +02:00
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void dbus_call_last_error_cleanup(void)
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{
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free(g_dbus_call_last_error_name);
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g_dbus_call_last_error_name = NULL;
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free(g_dbus_call_last_error_message);
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g_dbus_call_last_error_message = NULL;
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}
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bool dbus_call_last_error_is_name(const char * name)
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{
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return g_dbus_call_last_error_name != NULL && strcmp(name, g_dbus_call_last_error_name) == 0;
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}
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const char * dbus_call_last_error_get_message(void)
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{
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return g_dbus_call_last_error_message != NULL ? g_dbus_call_last_error_message : "";
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}
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static void dbus_call_last_error_set(void)
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{
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dbus_call_last_error_cleanup();
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if (g_dbus_error.name != NULL)
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{
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g_dbus_call_last_error_name = strdup(g_dbus_error.name);
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}
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if (g_dbus_error.message != NULL)
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{
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g_dbus_call_last_error_message = strdup(g_dbus_error.message);
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}
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}
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2010-03-07 13:45:10 +02:00
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bool dbus_iter_get_dict_entry(DBusMessageIter * iter_ptr, const char * key, void * value, int * type, int * size)
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2009-09-05 18:31:25 +03:00
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{
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2010-03-07 13:45:10 +02:00
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DBusMessageIter dict_iter;
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DBusMessageIter entry_iter;
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DBusMessageIter variant_iter;
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const char * current_key;
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DBusMessageIter array_iter;
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int n;
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int detype;
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dbus_message_iter_recurse(iter_ptr, &dict_iter);
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loop:
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detype = dbus_message_iter_get_arg_type(&dict_iter);
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if (detype == DBUS_TYPE_INVALID)
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{
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2009-09-05 18:31:25 +03:00
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return false;
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}
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2010-03-07 13:45:10 +02:00
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if (detype != DBUS_TYPE_DICT_ENTRY)
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{
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2009-09-20 18:23:42 +03:00
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log_error("Iterator does not point to a dict entry container");
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2009-09-05 18:31:25 +03:00
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return false;
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}
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2010-03-07 13:45:10 +02:00
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dbus_message_iter_recurse(&dict_iter, &entry_iter);
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2009-09-05 18:31:25 +03:00
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2010-03-07 13:45:10 +02:00
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if (dbus_message_iter_get_arg_type(&entry_iter) != DBUS_TYPE_STRING)
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{
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2009-09-20 18:23:42 +03:00
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log_error("Cannot find key in dict entry container");
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2009-09-05 18:31:25 +03:00
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return false;
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}
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2010-03-07 13:45:10 +02:00
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dbus_message_iter_get_basic(&entry_iter, ¤t_key);
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if (strcmp(current_key, key) != 0)
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{
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dbus_message_iter_next(&dict_iter);
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goto loop;
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}
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2009-09-05 18:31:25 +03:00
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2010-03-07 13:45:10 +02:00
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if (!dbus_message_iter_next(&entry_iter) || dbus_message_iter_get_arg_type(&entry_iter) != DBUS_TYPE_VARIANT)
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{
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2009-09-20 18:23:42 +03:00
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log_error("Cannot find variant container in dict entry");
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2009-09-05 18:31:25 +03:00
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return false;
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}
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2010-03-07 13:45:10 +02:00
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dbus_message_iter_recurse(&entry_iter, &variant_iter);
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2009-09-05 18:31:25 +03:00
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2010-03-07 13:45:10 +02:00
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*type = dbus_message_iter_get_arg_type(&variant_iter);
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if (*type == DBUS_TYPE_INVALID)
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{
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2009-09-20 18:23:42 +03:00
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log_error("Cannot find value in variant container");
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2009-09-05 18:31:25 +03:00
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return false;
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}
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2010-03-07 13:45:10 +02:00
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if (*type == DBUS_TYPE_ARRAY)
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{
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if (dbus_message_iter_get_element_type(&variant_iter) != DBUS_TYPE_BYTE)
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{
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2009-09-20 18:23:42 +03:00
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log_error("Dict entry value is a non-byte array");
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2009-09-05 18:31:25 +03:00
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return false;
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}
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2010-03-07 13:45:10 +02:00
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*type = '-';
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2009-09-05 18:31:25 +03:00
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dbus_message_iter_recurse(&variant_iter, &array_iter);
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2010-03-07 13:45:10 +02:00
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dbus_message_iter_get_fixed_array(&array_iter, value, &n);
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if (size != NULL)
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{
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*size = n;
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}
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}
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else
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{
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dbus_message_iter_get_basic(&variant_iter, value);
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}
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return true;
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}
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bool dbus_iter_get_dict_entry_string(DBusMessageIter * iter_ptr, const char * key, const char ** value)
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{
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int type;
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2009-09-05 18:31:25 +03:00
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2010-03-07 13:45:10 +02:00
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if (!dbus_iter_get_dict_entry(iter_ptr, key, value, &type, NULL))
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{
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return false;
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}
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if (type != DBUS_TYPE_STRING)
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{
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log_error("value of the dict entry '%s' is not a string", key);
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return false;
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}
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2009-09-05 18:31:25 +03:00
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return true;
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}
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/*
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* Append a variant type to a D-Bus message.
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* Return false if something fails, true otherwise.
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*/
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bool dbus_iter_append_variant(DBusMessageIter * iter, int type, const void * arg)
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{
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DBusMessageIter sub_iter;
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char s[2];
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s[0] = (char)type;
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s[1] = '\0';
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/* Open a variant container. */
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if (!dbus_message_iter_open_container(iter, DBUS_TYPE_VARIANT, (const char *)s, &sub_iter))
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return false;
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/* Append the supplied value. */
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if (!dbus_message_iter_append_basic(&sub_iter, type, arg))
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{
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dbus_message_iter_close_container(iter, &sub_iter);
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return false;
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}
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/* Close the container. */
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if (!dbus_message_iter_close_container(iter, &sub_iter))
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return false;
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return true;
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}
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static __inline__ bool dbus_iter_append_variant_raw(DBusMessageIter * iter, const void * buf, int len)
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{
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DBusMessageIter variant_iter, array_iter;
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/* Open a variant container. */
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if (!dbus_message_iter_open_container(iter, DBUS_TYPE_VARIANT,
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"ay", &variant_iter))
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return false;
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/* Open an array container. */
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if (!dbus_message_iter_open_container(&variant_iter, DBUS_TYPE_ARRAY,
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"y", &array_iter))
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goto fail;
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/* Append the supplied data. */
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if (!dbus_message_iter_append_fixed_array(&array_iter, DBUS_TYPE_BYTE, buf, len)) {
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dbus_message_iter_close_container(&variant_iter, &array_iter);
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goto fail;
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}
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/* Close the containers. */
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if (!dbus_message_iter_close_container(&variant_iter, &array_iter))
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goto fail;
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else if (!dbus_message_iter_close_container(iter, &variant_iter))
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return false;
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return true;
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fail:
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dbus_message_iter_close_container(iter, &variant_iter);
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return false;
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}
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bool dbus_iter_append_dict_entry(DBusMessageIter * iter, int type, const char * key, const void * value, int length)
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{
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DBusMessageIter dict_iter;
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if (!dbus_message_iter_open_container(iter, DBUS_TYPE_DICT_ENTRY, NULL, &dict_iter))
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return false;
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if (!dbus_message_iter_append_basic(&dict_iter, DBUS_TYPE_STRING, &key))
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goto fail;
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if (type == '-')
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{
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if (!dbus_iter_append_variant_raw(&dict_iter, value, length))
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goto fail;
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}
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else if (!dbus_iter_append_variant(&dict_iter, type, value))
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{
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goto fail;
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}
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if (!dbus_message_iter_close_container(iter, &dict_iter))
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return false;
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return true;
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fail:
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dbus_message_iter_close_container(iter, &dict_iter);
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return false;
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}
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2009-07-31 00:48:20 +03:00
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bool dbus_maybe_add_dict_entry_string(DBusMessageIter *dict_iter_ptr, const char * key, const char * value)
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{
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DBusMessageIter dict_entry_iter;
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if (value == NULL)
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{
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return true;
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}
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if (!dbus_message_iter_open_container(dict_iter_ptr, DBUS_TYPE_DICT_ENTRY, NULL, &dict_entry_iter))
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{
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return false;
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}
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if (!dbus_message_iter_append_basic(&dict_entry_iter, DBUS_TYPE_STRING, (const void *) &key))
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{
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dbus_message_iter_close_container(dict_iter_ptr, &dict_entry_iter);
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return false;
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}
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|
2009-09-05 18:31:25 +03:00
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dbus_iter_append_variant(&dict_entry_iter, DBUS_TYPE_STRING, &value);
|
2009-07-31 00:48:20 +03:00
|
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if (!dbus_message_iter_close_container(dict_iter_ptr, &dict_entry_iter))
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{
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return false;
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}
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return true;
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}
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bool dbus_add_dict_entry_uint32(DBusMessageIter * dict_iter_ptr, const char * key, dbus_uint32_t value)
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|
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|
{
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DBusMessageIter dict_entry_iter;
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|
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if (!dbus_message_iter_open_container(dict_iter_ptr, DBUS_TYPE_DICT_ENTRY, NULL, &dict_entry_iter))
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{
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return false;
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}
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if (!dbus_message_iter_append_basic(&dict_entry_iter, DBUS_TYPE_STRING, (const void *) &key))
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{
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dbus_message_iter_close_container(dict_iter_ptr, &dict_entry_iter);
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return false;
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}
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|
2009-09-05 18:31:25 +03:00
|
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|
dbus_iter_append_variant(&dict_entry_iter, DBUS_TYPE_UINT32, &value);
|
2009-07-31 00:48:20 +03:00
|
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if (!dbus_message_iter_close_container(dict_iter_ptr, &dict_entry_iter))
|
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|
{
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|
return false;
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}
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|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
bool dbus_add_dict_entry_bool(DBusMessageIter * dict_iter_ptr, const char * key, dbus_bool_t value)
|
|
|
|
{
|
|
|
|
DBusMessageIter dict_entry_iter;
|
|
|
|
|
|
|
|
if (!dbus_message_iter_open_container(dict_iter_ptr, DBUS_TYPE_DICT_ENTRY, NULL, &dict_entry_iter))
|
|
|
|
{
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!dbus_message_iter_append_basic(&dict_entry_iter, DBUS_TYPE_STRING, (const void *) &key))
|
|
|
|
{
|
|
|
|
dbus_message_iter_close_container(dict_iter_ptr, &dict_entry_iter);
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
2009-09-05 18:31:25 +03:00
|
|
|
dbus_iter_append_variant(&dict_entry_iter, DBUS_TYPE_BOOLEAN, &value);
|
2009-07-31 00:48:20 +03:00
|
|
|
|
|
|
|
if (!dbus_message_iter_close_container(dict_iter_ptr, &dict_entry_iter))
|
|
|
|
{
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
return true;
|
|
|
|
}
|
2009-08-09 22:19:32 +03:00
|
|
|
|
2010-12-02 05:21:51 +02:00
|
|
|
DBusMessage *
|
|
|
|
dbus_call_raw(
|
|
|
|
unsigned int timeout,
|
|
|
|
DBusMessage * request_ptr)
|
|
|
|
{
|
|
|
|
DBusMessage * reply_ptr;
|
|
|
|
|
|
|
|
if (timeout == 0)
|
|
|
|
{
|
|
|
|
timeout = DBUS_CALL_DEFAULT_TIMEOUT;
|
|
|
|
}
|
|
|
|
|
|
|
|
reply_ptr = dbus_connection_send_with_reply_and_block(
|
|
|
|
g_dbus_connection,
|
|
|
|
request_ptr,
|
|
|
|
timeout,
|
|
|
|
&g_dbus_error);
|
|
|
|
if (reply_ptr == NULL)
|
|
|
|
{
|
2010-12-23 02:36:58 +02:00
|
|
|
dbus_call_last_error_set();
|
2010-12-02 05:21:51 +02:00
|
|
|
dbus_error_free(&g_dbus_error);
|
|
|
|
}
|
|
|
|
|
|
|
|
return reply_ptr;
|
|
|
|
}
|
|
|
|
|
2011-07-31 19:16:40 +03:00
|
|
|
DBusMessage *
|
|
|
|
cdbus_new_method_call_message_valist(
|
|
|
|
const char * service,
|
|
|
|
const char * object,
|
|
|
|
const char * iface,
|
|
|
|
const char * method,
|
|
|
|
const char * input_signature,
|
|
|
|
va_list * vargs_ptr)
|
|
|
|
{
|
|
|
|
DBusMessage * msg_ptr;
|
|
|
|
DBusSignatureIter sig_iter;
|
|
|
|
int type;
|
|
|
|
void * parameter_ptr;
|
|
|
|
DBusMessageIter iter;
|
|
|
|
|
|
|
|
if (!dbus_signature_validate(input_signature, NULL))
|
|
|
|
{
|
|
|
|
log_error("input signature '%s' is invalid", input_signature);
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
dbus_signature_iter_init(&sig_iter, input_signature);
|
|
|
|
|
|
|
|
msg_ptr = dbus_message_new_method_call(service, object, iface, method);
|
|
|
|
if (msg_ptr == NULL)
|
|
|
|
{
|
|
|
|
log_error("dbus_message_new_method_call() failed.");
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
dbus_message_iter_init_append(msg_ptr, &iter);
|
|
|
|
|
|
|
|
while (*input_signature != '\0')
|
|
|
|
{
|
|
|
|
type = dbus_signature_iter_get_current_type(&sig_iter);
|
|
|
|
if (!dbus_type_is_basic(type))
|
|
|
|
{
|
|
|
|
log_error("non-basic input parameter '%c' (%d)", *input_signature, type);
|
|
|
|
goto unref;
|
|
|
|
}
|
|
|
|
|
|
|
|
parameter_ptr = va_arg(*vargs_ptr, void *);
|
|
|
|
|
|
|
|
if (!dbus_message_iter_append_basic(&iter, type, parameter_ptr))
|
|
|
|
{
|
|
|
|
log_error("dbus_message_iter_append_basic() failed.");
|
|
|
|
goto unref;
|
|
|
|
}
|
|
|
|
|
|
|
|
dbus_signature_iter_next(&sig_iter);
|
|
|
|
input_signature++;
|
|
|
|
}
|
|
|
|
|
|
|
|
return msg_ptr;
|
|
|
|
unref:
|
|
|
|
dbus_message_unref(msg_ptr);
|
|
|
|
fail:
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
DBusMessage *
|
|
|
|
cdbus_new_method_call_message(
|
|
|
|
const char * service,
|
|
|
|
const char * object,
|
|
|
|
const char * iface,
|
|
|
|
const char * method,
|
|
|
|
const char * input_signature,
|
|
|
|
...)
|
|
|
|
{
|
|
|
|
va_list vargs;
|
|
|
|
DBusMessage * msg_ptr;
|
|
|
|
|
|
|
|
va_start(vargs, input_signature);
|
|
|
|
msg_ptr = cdbus_new_method_call_message_valist(service, object, iface, method, input_signature, &vargs);
|
|
|
|
va_end(vargs);
|
|
|
|
|
|
|
|
return msg_ptr;
|
|
|
|
}
|
|
|
|
|
2009-08-09 22:19:32 +03:00
|
|
|
bool
|
2009-09-05 19:04:56 +03:00
|
|
|
dbus_call(
|
2010-12-02 03:51:43 +02:00
|
|
|
unsigned int timeout,
|
2009-08-09 22:19:32 +03:00
|
|
|
const char * service,
|
|
|
|
const char * object,
|
|
|
|
const char * iface,
|
|
|
|
const char * method,
|
2009-09-05 19:04:56 +03:00
|
|
|
const char * input_signature,
|
2009-08-09 22:19:32 +03:00
|
|
|
...)
|
|
|
|
{
|
|
|
|
DBusMessageIter iter;
|
|
|
|
DBusMessage * request_ptr;
|
|
|
|
DBusMessage * reply_ptr;
|
|
|
|
const char * output_signature;
|
|
|
|
const char * reply_signature;
|
|
|
|
va_list ap;
|
|
|
|
bool ret;
|
|
|
|
void * parameter_ptr;
|
|
|
|
|
2009-09-20 18:23:42 +03:00
|
|
|
//log_info("dbus_call('%s', '%s', '%s', '%s')", service, object, iface, method);
|
2009-08-09 22:19:32 +03:00
|
|
|
|
|
|
|
ret = false;
|
|
|
|
va_start(ap, input_signature);
|
|
|
|
|
2009-09-05 19:19:55 +03:00
|
|
|
if (input_signature != NULL)
|
2009-08-09 22:19:32 +03:00
|
|
|
{
|
2011-07-31 19:16:40 +03:00
|
|
|
request_ptr = cdbus_new_method_call_message_valist(service, object, iface, method, input_signature, &ap);
|
2009-09-05 19:19:55 +03:00
|
|
|
if (request_ptr == NULL)
|
2009-08-09 22:19:32 +03:00
|
|
|
{
|
|
|
|
goto fail;
|
|
|
|
}
|
2009-09-05 19:19:55 +03:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
request_ptr = va_arg(ap, DBusMessage *);
|
2009-08-09 22:19:32 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
output_signature = va_arg(ap, const char *);
|
|
|
|
|
2010-12-02 05:21:51 +02:00
|
|
|
reply_ptr = dbus_call_raw(timeout, request_ptr);
|
2009-08-09 22:19:32 +03:00
|
|
|
|
2009-09-05 19:19:55 +03:00
|
|
|
if (input_signature != NULL)
|
|
|
|
{
|
|
|
|
dbus_message_unref(request_ptr);
|
|
|
|
}
|
2009-08-09 22:19:32 +03:00
|
|
|
|
|
|
|
if (reply_ptr == NULL)
|
|
|
|
{
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
2009-08-10 02:18:55 +03:00
|
|
|
if (output_signature != NULL)
|
2009-08-09 22:19:32 +03:00
|
|
|
{
|
2009-08-10 02:18:55 +03:00
|
|
|
reply_signature = dbus_message_get_signature(reply_ptr);
|
|
|
|
|
|
|
|
if (strcmp(reply_signature, output_signature) != 0)
|
|
|
|
{
|
2009-09-20 18:23:42 +03:00
|
|
|
log_error("reply signature is '%s' but expected signature is '%s'", reply_signature, output_signature);
|
2009-08-10 02:18:55 +03:00
|
|
|
}
|
2009-08-09 22:19:32 +03:00
|
|
|
|
2009-08-10 02:18:55 +03:00
|
|
|
dbus_message_iter_init(reply_ptr, &iter);
|
2009-08-09 22:19:32 +03:00
|
|
|
|
2009-08-10 02:18:55 +03:00
|
|
|
while (*output_signature++ != '\0')
|
|
|
|
{
|
2009-09-20 18:48:42 +03:00
|
|
|
ASSERT(dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_INVALID); /* we've checked the signature, this should not happen */
|
2009-08-10 02:18:55 +03:00
|
|
|
parameter_ptr = va_arg(ap, void *);
|
|
|
|
dbus_message_iter_get_basic(&iter, parameter_ptr);
|
|
|
|
dbus_message_iter_next(&iter);
|
|
|
|
}
|
|
|
|
|
2009-09-20 18:48:42 +03:00
|
|
|
ASSERT(dbus_message_iter_get_arg_type(&iter) == DBUS_TYPE_INVALID); /* we've checked the signature, this should not happen */
|
2009-09-07 20:49:16 +03:00
|
|
|
dbus_message_unref(reply_ptr);
|
2009-08-10 02:18:55 +03:00
|
|
|
}
|
|
|
|
else
|
2009-08-09 22:19:32 +03:00
|
|
|
{
|
2009-08-10 02:18:55 +03:00
|
|
|
parameter_ptr = va_arg(ap, DBusMessage **);
|
|
|
|
*(DBusMessage **)parameter_ptr = reply_ptr;
|
2009-08-09 22:19:32 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
ret = true;
|
|
|
|
|
|
|
|
fail:
|
|
|
|
va_end(ap);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2009-08-20 00:51:27 +03:00
|
|
|
static
|
|
|
|
const char *
|
|
|
|
compose_signal_match(
|
|
|
|
const char * service,
|
|
|
|
const char * object,
|
|
|
|
const char * iface,
|
|
|
|
const char * signal)
|
|
|
|
{
|
|
|
|
static char rule[1024];
|
|
|
|
snprintf(rule, sizeof(rule), "type='signal',sender='%s',path='%s',interface='%s',member='%s'", service, object, iface, signal);
|
|
|
|
return rule;
|
|
|
|
}
|
|
|
|
|
2009-12-13 17:48:29 +02:00
|
|
|
static const char * compose_name_owner_match(const char * service)
|
|
|
|
{
|
|
|
|
static char rule[1024];
|
|
|
|
snprintf(rule, sizeof(rule), "type='signal',interface='"DBUS_INTERFACE_DBUS"',member=NameOwnerChanged,arg0='%s'", service);
|
|
|
|
return rule;
|
|
|
|
}
|
|
|
|
|
2009-08-20 00:51:27 +03:00
|
|
|
bool
|
|
|
|
dbus_register_object_signal_handler(
|
|
|
|
DBusConnection * connection,
|
|
|
|
const char * service,
|
|
|
|
const char * object,
|
|
|
|
const char * iface,
|
|
|
|
const char * const * signals,
|
|
|
|
DBusHandleMessageFunction handler,
|
|
|
|
void * handler_data)
|
|
|
|
{
|
|
|
|
const char * const * signal;
|
|
|
|
|
|
|
|
for (signal = signals; *signal != NULL; signal++)
|
|
|
|
{
|
|
|
|
dbus_bus_add_match(connection, compose_signal_match(service, object, iface, *signal), &g_dbus_error);
|
|
|
|
if (dbus_error_is_set(&g_dbus_error))
|
|
|
|
{
|
2009-09-20 18:23:42 +03:00
|
|
|
log_error("Failed to add D-Bus match rule: %s", g_dbus_error.message);
|
2009-08-20 00:51:27 +03:00
|
|
|
dbus_error_free(&g_dbus_error);
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
dbus_connection_add_filter(g_dbus_connection, handler, handler_data, NULL);
|
|
|
|
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
bool
|
|
|
|
dbus_unregister_object_signal_handler(
|
|
|
|
DBusConnection * connection,
|
|
|
|
const char * service,
|
|
|
|
const char * object,
|
|
|
|
const char * iface,
|
|
|
|
const char * const * signals,
|
|
|
|
DBusHandleMessageFunction handler,
|
|
|
|
void * handler_data)
|
|
|
|
{
|
|
|
|
const char * const * signal;
|
|
|
|
|
|
|
|
for (signal = signals; *signal != NULL; signal++)
|
|
|
|
{
|
|
|
|
dbus_bus_remove_match(connection, compose_signal_match(service, object, iface, *signal), &g_dbus_error);
|
|
|
|
if (dbus_error_is_set(&g_dbus_error))
|
|
|
|
{
|
2009-12-13 17:48:29 +02:00
|
|
|
log_error("Failed to remove D-Bus match rule: %s", g_dbus_error.message);
|
2009-08-20 00:51:27 +03:00
|
|
|
dbus_error_free(&g_dbus_error);
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
dbus_connection_remove_filter(g_dbus_connection, handler, handler_data);
|
|
|
|
|
|
|
|
return true;
|
|
|
|
}
|
2009-12-13 17:48:29 +02:00
|
|
|
|
|
|
|
static
|
|
|
|
struct dbus_signal_hook_descriptor *
|
|
|
|
find_signal_hook_descriptor(
|
|
|
|
struct dbus_service_descriptor * service_ptr,
|
|
|
|
const char * object,
|
|
|
|
const char * interface)
|
|
|
|
{
|
|
|
|
struct list_head * node_ptr;
|
|
|
|
struct dbus_signal_hook_descriptor * hook_ptr;
|
|
|
|
|
|
|
|
list_for_each(node_ptr, &service_ptr->hooks)
|
|
|
|
{
|
|
|
|
hook_ptr = list_entry(node_ptr, struct dbus_signal_hook_descriptor, siblings);
|
|
|
|
if (strcmp(hook_ptr->object, object) == 0 &&
|
|
|
|
strcmp(hook_ptr->interface, interface) == 0)
|
|
|
|
{
|
|
|
|
return hook_ptr;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
#define service_ptr ((struct dbus_service_descriptor *)data)
|
|
|
|
|
|
|
|
static
|
|
|
|
DBusHandlerResult
|
|
|
|
dbus_signal_handler(
|
|
|
|
DBusConnection * connection_ptr,
|
|
|
|
DBusMessage * message_ptr,
|
|
|
|
void * data)
|
|
|
|
{
|
|
|
|
const char * object_path;
|
|
|
|
const char * interface;
|
|
|
|
const char * signal_name;
|
|
|
|
const char * object_name;
|
|
|
|
const char * old_owner;
|
|
|
|
const char * new_owner;
|
|
|
|
struct dbus_signal_hook_descriptor * hook_ptr;
|
|
|
|
const struct dbus_signal_hook * signal_ptr;
|
|
|
|
|
|
|
|
/* Non-signal messages are ignored */
|
|
|
|
if (dbus_message_get_type(message_ptr) != DBUS_MESSAGE_TYPE_SIGNAL)
|
|
|
|
{
|
|
|
|
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
|
|
|
|
}
|
|
|
|
|
|
|
|
interface = dbus_message_get_interface(message_ptr);
|
|
|
|
if (interface == NULL)
|
|
|
|
{
|
|
|
|
/* Signals with no interface are ignored */
|
|
|
|
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
|
|
|
|
}
|
|
|
|
|
|
|
|
object_path = dbus_message_get_path(message_ptr);
|
|
|
|
|
|
|
|
signal_name = dbus_message_get_member(message_ptr);
|
|
|
|
if (signal_name == NULL)
|
|
|
|
{
|
|
|
|
log_error("Received signal with NULL member");
|
|
|
|
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
|
|
|
|
}
|
|
|
|
|
|
|
|
log_debug("'%s' sent signal '%s'::'%s'", object_path, interface, signal_name);
|
|
|
|
|
|
|
|
/* Handle session bus signals to track service alive state */
|
|
|
|
if (strcmp(interface, DBUS_INTERFACE_DBUS) == 0)
|
|
|
|
{
|
|
|
|
if (strcmp(signal_name, "NameOwnerChanged") != 0)
|
|
|
|
{
|
|
|
|
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (service_ptr->lifetime_hook_function == NULL)
|
|
|
|
{
|
|
|
|
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
|
|
|
|
}
|
|
|
|
|
|
|
|
//log_info("NameOwnerChanged signal received");
|
|
|
|
|
|
|
|
dbus_error_init(&g_dbus_error);
|
|
|
|
if (!dbus_message_get_args(
|
|
|
|
message_ptr,
|
|
|
|
&g_dbus_error,
|
|
|
|
DBUS_TYPE_STRING, &object_name,
|
|
|
|
DBUS_TYPE_STRING, &old_owner,
|
|
|
|
DBUS_TYPE_STRING, &new_owner,
|
|
|
|
DBUS_TYPE_INVALID))
|
|
|
|
{
|
|
|
|
log_error("Cannot get message arguments: %s", g_dbus_error.message);
|
|
|
|
dbus_error_free(&g_dbus_error);
|
|
|
|
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (strcmp(object_name, service_ptr->service_name) != 0)
|
|
|
|
{
|
|
|
|
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (old_owner[0] == '\0')
|
|
|
|
{
|
|
|
|
service_ptr->lifetime_hook_function(true);
|
|
|
|
}
|
|
|
|
else if (new_owner[0] == '\0')
|
|
|
|
{
|
|
|
|
service_ptr->lifetime_hook_function(false);
|
|
|
|
}
|
|
|
|
|
|
|
|
return DBUS_HANDLER_RESULT_HANDLED;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Handle object interface signals */
|
|
|
|
if (object_path != NULL)
|
|
|
|
{
|
|
|
|
hook_ptr = find_signal_hook_descriptor(service_ptr, object_path, interface);
|
|
|
|
if (hook_ptr != NULL)
|
|
|
|
{
|
|
|
|
for (signal_ptr = hook_ptr->signal_hooks; signal_ptr->signal_name != NULL; signal_ptr++)
|
|
|
|
{
|
|
|
|
if (strcmp(signal_name, signal_ptr->signal_name) == 0)
|
|
|
|
{
|
|
|
|
signal_ptr->hook_function(hook_ptr->hook_context, message_ptr);
|
|
|
|
return DBUS_HANDLER_RESULT_HANDLED;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Let everything else pass through */
|
|
|
|
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
|
|
|
|
}
|
|
|
|
|
|
|
|
#undef service_ptr
|
|
|
|
|
|
|
|
static struct dbus_service_descriptor * find_service_descriptor(const char * service_name)
|
|
|
|
{
|
|
|
|
struct list_head * node_ptr;
|
|
|
|
struct dbus_service_descriptor * descr_ptr;
|
|
|
|
|
|
|
|
list_for_each(node_ptr, &g_dbus_services)
|
|
|
|
{
|
|
|
|
descr_ptr = list_entry(node_ptr, struct dbus_service_descriptor, siblings);
|
|
|
|
if (strcmp(descr_ptr->service_name, service_name) == 0)
|
|
|
|
{
|
|
|
|
return descr_ptr;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct dbus_service_descriptor * find_or_create_service_descriptor(const char * service_name)
|
|
|
|
{
|
|
|
|
struct dbus_service_descriptor * descr_ptr;
|
|
|
|
|
|
|
|
descr_ptr = find_service_descriptor(service_name);
|
|
|
|
if (descr_ptr != NULL)
|
|
|
|
{
|
|
|
|
return descr_ptr;
|
|
|
|
}
|
|
|
|
|
|
|
|
descr_ptr = malloc(sizeof(struct dbus_service_descriptor));
|
|
|
|
if (descr_ptr == NULL)
|
|
|
|
{
|
|
|
|
log_error("malloc() failed to allocate struct dbus_service_descriptor");
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
descr_ptr->service_name = strdup(service_name);
|
|
|
|
if (descr_ptr->service_name == NULL)
|
|
|
|
{
|
|
|
|
log_error("strdup() failed for service name '%s'", service_name);
|
|
|
|
free(descr_ptr);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
descr_ptr->lifetime_hook_function = NULL;
|
|
|
|
INIT_LIST_HEAD(&descr_ptr->hooks);
|
|
|
|
|
|
|
|
list_add_tail(&descr_ptr->siblings, &g_dbus_services);
|
|
|
|
|
|
|
|
dbus_connection_add_filter(g_dbus_connection, dbus_signal_handler, descr_ptr, NULL);
|
|
|
|
|
|
|
|
return descr_ptr;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void free_service_descriptor_if_empty(struct dbus_service_descriptor * service_ptr)
|
|
|
|
{
|
|
|
|
if (service_ptr->lifetime_hook_function != NULL)
|
|
|
|
{
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!list_empty(&service_ptr->hooks))
|
|
|
|
{
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
dbus_connection_remove_filter(g_dbus_connection, dbus_signal_handler, service_ptr);
|
|
|
|
|
|
|
|
list_del(&service_ptr->siblings);
|
|
|
|
free(service_ptr->service_name);
|
|
|
|
free(service_ptr);
|
|
|
|
}
|
|
|
|
|
|
|
|
bool
|
|
|
|
dbus_register_object_signal_hooks(
|
|
|
|
DBusConnection * connection,
|
|
|
|
const char * service_name,
|
|
|
|
const char * object,
|
|
|
|
const char * iface,
|
|
|
|
void * hook_context,
|
|
|
|
const struct dbus_signal_hook * signal_hooks)
|
|
|
|
{
|
|
|
|
struct dbus_service_descriptor * service_ptr;
|
|
|
|
struct dbus_signal_hook_descriptor * hook_ptr;
|
|
|
|
const struct dbus_signal_hook * signal_ptr;
|
|
|
|
|
|
|
|
if (connection != g_dbus_connection)
|
|
|
|
{
|
|
|
|
log_error("multiple connections are not implemented yet");
|
|
|
|
ASSERT_NO_PASS;
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
service_ptr = find_or_create_service_descriptor(service_name);
|
|
|
|
if (service_ptr == NULL)
|
|
|
|
{
|
|
|
|
log_error("find_or_create_service_descriptor() failed.");
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
hook_ptr = find_signal_hook_descriptor(service_ptr, object, iface);
|
|
|
|
if (hook_ptr != NULL)
|
|
|
|
{
|
|
|
|
log_error("refusing to register two signal monitors for '%s':'%s':'%s'", service_name, object, iface);
|
|
|
|
ASSERT_NO_PASS;
|
|
|
|
goto maybe_free_service;
|
|
|
|
}
|
|
|
|
|
|
|
|
hook_ptr = malloc(sizeof(struct dbus_signal_hook_descriptor));
|
|
|
|
if (hook_ptr == NULL)
|
|
|
|
{
|
|
|
|
log_error("malloc() failed to allocate struct dbus_signal_hook_descriptor");
|
|
|
|
goto maybe_free_service;
|
|
|
|
}
|
|
|
|
|
|
|
|
hook_ptr->object = strdup(object);
|
|
|
|
if (hook_ptr->object == NULL)
|
|
|
|
{
|
|
|
|
log_error("strdup() failed for object name");
|
|
|
|
goto free_hook;
|
|
|
|
}
|
|
|
|
|
|
|
|
hook_ptr->interface = strdup(iface);
|
|
|
|
if (hook_ptr->interface == NULL)
|
|
|
|
{
|
|
|
|
log_error("strdup() failed for interface name");
|
|
|
|
goto free_object_name;
|
|
|
|
}
|
|
|
|
|
|
|
|
hook_ptr->hook_context = hook_context;
|
|
|
|
hook_ptr->signal_hooks = signal_hooks;
|
|
|
|
|
|
|
|
list_add_tail(&hook_ptr->siblings, &service_ptr->hooks);
|
|
|
|
|
|
|
|
for (signal_ptr = signal_hooks; signal_ptr->signal_name != NULL; signal_ptr++)
|
|
|
|
{
|
|
|
|
dbus_bus_add_match(connection, compose_signal_match(service_name, object, iface, signal_ptr->signal_name), &g_dbus_error);
|
|
|
|
if (dbus_error_is_set(&g_dbus_error))
|
|
|
|
{
|
|
|
|
log_error("Failed to add D-Bus match rule: %s", g_dbus_error.message);
|
|
|
|
dbus_error_free(&g_dbus_error);
|
|
|
|
|
|
|
|
while (signal_ptr != signal_hooks)
|
|
|
|
{
|
|
|
|
ASSERT(signal_ptr > signal_hooks);
|
|
|
|
signal_ptr--;
|
|
|
|
|
|
|
|
dbus_bus_remove_match(connection, compose_signal_match(service_name, object, iface, signal_ptr->signal_name), &g_dbus_error);
|
|
|
|
if (dbus_error_is_set(&g_dbus_error))
|
|
|
|
{
|
|
|
|
log_error("Failed to remove D-Bus match rule: %s", g_dbus_error.message);
|
|
|
|
dbus_error_free(&g_dbus_error);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
goto remove_hook;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return true;
|
|
|
|
|
|
|
|
remove_hook:
|
|
|
|
list_del(&hook_ptr->siblings);
|
|
|
|
free(hook_ptr->interface);
|
|
|
|
free_object_name:
|
|
|
|
free(hook_ptr->object);
|
|
|
|
free_hook:
|
|
|
|
free(hook_ptr);
|
|
|
|
maybe_free_service:
|
|
|
|
free_service_descriptor_if_empty(service_ptr);
|
|
|
|
fail:
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
dbus_unregister_object_signal_hooks(
|
|
|
|
DBusConnection * connection,
|
|
|
|
const char * service_name,
|
|
|
|
const char * object,
|
|
|
|
const char * iface)
|
|
|
|
{
|
|
|
|
struct dbus_service_descriptor * service_ptr;
|
|
|
|
struct dbus_signal_hook_descriptor * hook_ptr;
|
|
|
|
const struct dbus_signal_hook * signal_ptr;
|
|
|
|
|
|
|
|
if (connection != g_dbus_connection)
|
|
|
|
{
|
|
|
|
log_error("multiple connections are not implemented yet");
|
|
|
|
ASSERT_NO_PASS;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
service_ptr = find_service_descriptor(service_name);
|
|
|
|
if (service_ptr == NULL)
|
|
|
|
{
|
|
|
|
log_error("find_service_descriptor() failed.");
|
|
|
|
ASSERT_NO_PASS;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
hook_ptr = find_signal_hook_descriptor(service_ptr, object, iface);
|
|
|
|
if (hook_ptr == NULL)
|
|
|
|
{
|
|
|
|
log_error("cannot unregister non-existing signal monitor for '%s':'%s':'%s'", service_name, object, iface);
|
|
|
|
ASSERT_NO_PASS;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
for (signal_ptr = hook_ptr->signal_hooks; signal_ptr->signal_name != NULL; signal_ptr++)
|
|
|
|
{
|
|
|
|
dbus_bus_remove_match(connection, compose_signal_match(service_name, object, iface, signal_ptr->signal_name), &g_dbus_error);
|
|
|
|
if (dbus_error_is_set(&g_dbus_error))
|
|
|
|
{
|
|
|
|
if (dbus_error_is_set(&g_dbus_error))
|
|
|
|
{
|
|
|
|
log_error("Failed to remove D-Bus match rule: %s", g_dbus_error.message);
|
|
|
|
dbus_error_free(&g_dbus_error);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
list_del(&hook_ptr->siblings);
|
|
|
|
|
|
|
|
free(hook_ptr->interface);
|
|
|
|
free(hook_ptr->object);
|
|
|
|
free(hook_ptr);
|
|
|
|
|
|
|
|
free_service_descriptor_if_empty(service_ptr);
|
|
|
|
}
|
|
|
|
|
|
|
|
bool
|
|
|
|
dbus_register_service_lifetime_hook(
|
|
|
|
DBusConnection * connection,
|
|
|
|
const char * service_name,
|
|
|
|
void (* hook_function)(bool appeared))
|
|
|
|
{
|
|
|
|
struct dbus_service_descriptor * service_ptr;
|
|
|
|
|
|
|
|
if (connection != g_dbus_connection)
|
|
|
|
{
|
|
|
|
log_error("multiple connections are not implemented yet");
|
|
|
|
ASSERT_NO_PASS;
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
service_ptr = find_or_create_service_descriptor(service_name);
|
|
|
|
if (service_ptr == NULL)
|
|
|
|
{
|
|
|
|
log_error("find_or_create_service_descriptor() failed.");
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (service_ptr->lifetime_hook_function != NULL)
|
|
|
|
{
|
|
|
|
log_error("cannot register two lifetime hooks for '%s'", service_name);
|
|
|
|
ASSERT_NO_PASS;
|
|
|
|
goto maybe_free_service;
|
|
|
|
}
|
|
|
|
|
|
|
|
service_ptr->lifetime_hook_function = hook_function;
|
|
|
|
|
|
|
|
dbus_bus_add_match(connection, compose_name_owner_match(service_name), &g_dbus_error);
|
|
|
|
if (dbus_error_is_set(&g_dbus_error))
|
|
|
|
{
|
|
|
|
log_error("Failed to add D-Bus match rule: %s", g_dbus_error.message);
|
|
|
|
dbus_error_free(&g_dbus_error);
|
|
|
|
goto clear_hook;
|
|
|
|
}
|
|
|
|
|
|
|
|
return true;
|
|
|
|
|
|
|
|
clear_hook:
|
|
|
|
service_ptr->lifetime_hook_function = NULL;
|
|
|
|
maybe_free_service:
|
|
|
|
free_service_descriptor_if_empty(service_ptr);
|
|
|
|
fail:
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
dbus_unregister_service_lifetime_hook(
|
|
|
|
DBusConnection * connection,
|
|
|
|
const char * service_name)
|
|
|
|
{
|
|
|
|
struct dbus_service_descriptor * service_ptr;
|
|
|
|
|
|
|
|
if (connection != g_dbus_connection)
|
|
|
|
{
|
|
|
|
log_error("multiple connections are not implemented yet");
|
|
|
|
ASSERT_NO_PASS;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
service_ptr = find_service_descriptor(service_name);
|
|
|
|
if (service_ptr == NULL)
|
|
|
|
{
|
|
|
|
log_error("find_service_descriptor() failed.");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (service_ptr->lifetime_hook_function == NULL)
|
|
|
|
{
|
|
|
|
log_error("cannot unregister non-existent lifetime hook for '%s'", service_name);
|
|
|
|
ASSERT_NO_PASS;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
service_ptr->lifetime_hook_function = NULL;
|
|
|
|
|
|
|
|
dbus_bus_remove_match(connection, compose_name_owner_match(service_name), &g_dbus_error);
|
|
|
|
if (dbus_error_is_set(&g_dbus_error))
|
|
|
|
{
|
|
|
|
log_error("Failed to remove D-Bus match rule: %s", g_dbus_error.message);
|
|
|
|
dbus_error_free(&g_dbus_error);
|
|
|
|
}
|
|
|
|
|
|
|
|
free_service_descriptor_if_empty(service_ptr);
|
|
|
|
}
|